Graduated universal valve for gas appliances with slitted sleeve



P 195-3 1. v. BRUMBAUGH 2,650,613

- GRADUATE!) UNIVERSAL VALVE FOR GAS APPLIANCES WITH SLITTED SLEEVEFiled May 15, 1948 2 Sheets-Sheet 1 INVENTOR.

, |5MC VERNON BRIIMBAUGH F i g. 4 BY Sept. 1, 1953 v. BRUMBAUGH2,650,613

. GRADUATED UNIVERSAL VALVE FOR GAS APPLIANCES WITH SLITTED SLEEVE FiledMay 15, 1948 2 Sheets-Sheet 2 I INVENTOR! ISAAC VERNON BRIJMBAUGHPatented Sept. 1, 1953 UNITED STATES PATENT OFFICE GRADUATED UNIVERSALVALVE FOR GAS APPLIANCES WITH SLITTED SLEEVE 10 Claims.

The invention described in this application relates to valves. The valvedisclosed and described herein in illustration of the invention isespecially designed for use in controlling a cooking top burner of akitchen range but it is to be understood that the inventions involvedclearly have other uses. Thus the inventions involved are also useful inthe control of gas oven burners. They may also be used for the controlof gas outside of the cooking field, such as the various types of gasheating appliances. They may even be used for the control of otherfluids including liquids as well as gases. The valve illustrated isdesigned so that not only may the gas be turned on and off but also thesize of the flame may be varied as the valve is rotated from the full-onposition to the off position or from the off position to the full onposition or from the full on position to the simmer position, etc. Forexample as illustrated the size of the gas flame may be decreasedthrough a series of steps from an on or maximum flow position down to acondition in which the flame will provide onl enough heat to cause thematerial being cooked to boil gently or simmer and then the gas may becut off by a movement of the valve to the closed or off position. On theother hand if desired, I may modify the design to provide similar valvesin which the valve may be turned from the off position directly to thefull on position and then the flame may be decreased gradually through anumber of positions to the simmer position.

Prior hereto the large majority of gas valves (especially valves forcontrolling the cooking top burners of gas ranges) have been producedwith a casing having a single port and a plug formed I with a singleport which may be moved into and out of registration with the port inthe casing so that in the open position there is substantially a fullflow of gas and in the closed position there is no flow of gas. As theports in such prior art valves are brought from exact registration tothe closed position there is a decrease in the size of the flameproduced but inasmuch as the control is not usually accurate nordefinite therewith, the operator of such prior art devices had to bevery careful to prevent the gas from being turned completely off or tosuch a low position that the flame would go out. In order to obviatethis difficulty some designers have designed valves with a plurality ofdifferent sized ports through which gas may flow. These are usuallycomplicated and expensive to manufacture and some are very difficult tocontrol. In none of such prior art valves having a plurality of portscan the adjustment 2 be made for the heating value of the gas ashereinafter defined.

In my valves as illustrated herein the various settings of the gas flameare controlled by the use of numbers on the knob or control dial so thatafter the valve is properly adjusted, an operator may set the valve forany desired flame without looking at the flame but merely by the use ofthe numbers on the knob. It is true that some valves constructedaccording to my inventions, could be operated in the full on positionand adjacent thereto in a manner similar to the manner in which theprior art single port valves may be operated as described above (i. e.as the ports are brought from exact registration) (1. e. the full onposition) to closed position there is a decrease in the size of theflame produced. However, my valves are not intended or expected to be sooperated. It is so much more satisfactory to operate my valves in themanner in which they are especially intended that the operators willnever resort to the cumbersome operation which is similar to theoperation of the prior art valves.

My inventions are especially important when used in connection withgases having high heating values (1. e. high B. t. u. ratings) such asthe bottle gases (i. e. liquefied petroleum gas such as butane andpropane) and also the natural gases. With such gases it is especiallydifficult with the single port prior art valves to obtain a simmer flamewithout inadvertently extinguishing the flame entirely. The prior artvalves heretofore referred to, which are formed with a plurality ofports on the other hand are not usually satisfactory with all types ofgases because of difficulties in adjusting them for the wide range inheating value, specific gravities and distribution pressure of gasesused. The table given in my co-pending application, Serial No. 776,687,filed September 29, 1947, gives the approximate statistics for varioustypes of gases and illustrates the wide differences in these importantcharacteristics thereof. Not only the B. t. u. value of the gas but alsothe specific gravity thereof and the distribution pressure under whichthe gas is supplied, affect the adjustment of the valve. Whenever usedhereinafter in this specification and claims, I intend the words heatingvalue or heat value to be construed to mean heating value, specificgravity of gas and/or distribution pressure thereof at the appliance,etc.

In the valves described and shown in this ap plication in illustrationof my invention I provide a plug member with a series of substantiallyObjects One of the objects of my invention therefore, is theconstruction of an improved valve especially useful in connection withgas burners, the valve being simple in operation and economicalinconstruction. A further object of .my invention is the provision of avalve especially useful in connection with gas burners which may beadjusted from a full on position through a series of positions to .asimmer setting position or may alternatively be moved to an offposition.

A further object of my invention is the provision, in combination with avalve of the character described, of means for adjusting the valve tocompensate for different heating values of the gas for which it is .tobe used.

Features of my invention include the provision of a body member formedwith an inlet port and an outlet port; having associated therewith aplug formed with a plurality of ports spaced around the circumferencethereof; and having associated and combined with the plug and having arestricting port for each of the ports of the plug valve and arranged tobe adjusted relative to these ports in order to restrict or increase thesize of allof the ports simultaneously in order to compensate for theheating value of the gas being used. It should be understood that theplug may be rotated to register each of the ports of the .plugseparately and selectively with the inlet port of the casing so that thevalve in operation may control the size of the flame to provide a flameof the size desired corresponding to each of the ports as modified bythe associated port of the sleeve, whereby adjustment of the valve fordifferent heating values of the gas is possible and whereby afteradjustment operation of the valve to control the size of the flame ispossible.

Further objects and features of the invention will be apparent from thesubjoined specification and claims when considered in connection withthe accompanying drawings showing for the purpose of illustration onlythe embodiments of my invention.

Drawings In the drawings,

Fig. 1 is a view in side elevation of a valve constructed .according to:my invention the valve being shown associated with the front plate ormain panel and cooking top frame of a cooking range and with the mixing:tube thereof, portions of the valve, the mixing tube, the plate, theframe, and the gas manifold being shown in section;

Fig. 2 is a view in front elevation of the valve of Fig. 1 showing alsoa fragment of the range with which it is associated; 1

Fig. 3 is a view in front elevation of the valve of Figs. 1 and 2,portions of the range and the control knob having been removed;

Fig. 4 is a view in vertical section taken substantially on the line 4-4of Fig. 2;

Fig. 5 is a view in vertical section taken substantially on the line 5-5of Fig. 1;

Fig. 6 is a view of the sleeve in elevation;

Fig. 7 is an expanded view of the sleeve showing the sleeve as it wouldappear if severed and unrolled;

Fig. 8 is a sectional view similar to Fig. 4 showing an alternative formof valve; and

Fig. 9 is a view similar to Fig. 5 showing another vertical sectionalview of the valve of Fig. 8.

Referring now to the drawings for a detailed description of theinvention it may be seen that I have shown in Fig. 1 a valve llassociated with .a range having a mixing tube I2, a main panel 13, and acooking top frame [4. The valve H has a downwardly extending inlet bossI5 which is screwed into an inlet gas manifold 16. The mixing tube 12 isprovided with an air shutter H which is held in any desired adjustedposition by a screw l8. The inner end of the valve H is formed as athreaded projection or nozzle [9 onto which there is screwed an orificecap 2| which extends into the mixing tube l2. The boss [5 is formed withan inlet bore or passage 20. The valve H has a main body member 22 andthis is provided with a spring cap 23 forming a casing or cover. Withinthe body member 22 and the casing 23 is a plug member having a stem 24which extends forwardly from the valve and on which there is removablysecured a knob or dial member 25. As may be seen in Fig. 2 this knob ordial member is formed with markings off, sim, 2, 3, 4, 5, 6, and on.These markings cooperate with an indicating mark 26 formed on the panelI3 to indicate the position of the valve and indicate the amount of gaswhich may flow through the valve at the corresponding setting thereof.

As may be seen more clearly in Fig. 3, the stem 24 is formed with arelatively short flat surface 2'! and a relatively large flat surface 28by reason whereof the position of the knob 25 on the stem 24 isaccurately determined. Associated with the stem 24 is a stop sleeve 29which as shown in Figs. 1 and 3 surrounds a portion of the stem 24. Itis to be understood that this stop sleeve cooperates with a stop 3|formed as an indentation in the casing member 23 and so limits themovement of the dial 25. Thus the stem 24 and its associated plug maynot be turned beyond the off position in one direction (clockwise inFig. 3) and the full on position in the other direc tion(counterclockwise in Fig. 3). As may also be seen in Figs. 1 and 3 thecasing or spring cap 23 is secured to the main body member 22 by meansof a relatively large screw 32 and a relatively small screw 33 whichpass through corresponding pairs of ears formed on the body member 22and the casing 23.

Referring now especially to Figs. 4 and 5 it may be seen that the stem24 is a part of a plug member 34. The plug member 34 is hollow as at 35and houses within said hollow-a sleeve member 36. This sleeve member isimportant in connection with this embodiment of my invention and will bedescribed more completely later. This sleeve member 36 is resilientlyheld in position by an off center screw 37 threaded into the plug 34 andextending through an off center opening to the sleeve 36. A spring 38bears at one end on the base of the sleeve 36 and at its opposite end onthe head of the screw 31. Bearing also on the base of the sleeve 36 butonthe opposite side from the spring 38 is an obliquely extendingadjustment screw 39 the head of which may be seen in Fig. 3. It will .benoted that this adjustment screw is wholly within the spring cap 23.

As will be more fully described later the adjustment screw 39 acting onthe sleeve 36 positions the sleeve 36 as may be desired, it beingunderstood that the spring 38 maintains the sleeve 36 always in contactwith the screw 39. It will also be noted that in the simmer positionaccess to the screw 39 is possible through a notch 40. P- sitionedbetween the stop sleeve 29 and the main body of the plug 34 is a spring4|. The spring 4| surrounds a reduced portion 42 of the plug 34 andmaintains the stop sleeve 29 and the plug 34 in correct position.

Referring now to Figs. 5, 6, and 7 for a more specific description ofthe sleeve 36 it may be seen that the sleeve is formed with a relativelylarge notch, slot or port 46 formed in both the base and side of thesleeve. This larger notch 46 is provided to allow a full flow of gas atthe "on position. The sleeve is also formed with a plurality of oblongslots of varying widths such as 41, 48, 49, 5|, 52, and 53. These slotsvary in width from the relatively narrow slot 53 to the relatively wideslot 4?. They are oblong with parallel sides and the end whichcooperates with the associated round port in the plug is arcual. Theopposite end may also be arcual, although this is not material. By thisconstruction a finer and more accurate adjustment with gases of highheating value is possible. The sleeve is also formed with an imperforateportion 54.

As appears most clearly in Fig. 5, the plug 34 is formed with a seriesof ports 55, 55, 51, 53, 59, 6|, and 62 which correspond in positionwith the ports 46, 41, 48, 49, 5|, 52, and 53. However, all of the plugports 56, 51, 58, 59, 6|, and 62 are round and of substantially equalsize. They could be drilled simultaneously or consecutively on the samecenter line and in the same plane. The port 55 is oval in shape. Theplug also has an imperforate portion 63 corresponding to sleeve portion54. The inlet port from the inlet bore or passage is oval as shown at 69and as may be understood from a comparison of Figs. 4 and 5.

It is believed that the operation of the valve described above will befairly obvious from the description. With the valve in the positionshown in Figs. 2, 3, 4, and 5, gas may flow from the manifold |6 throughthe inlet passage 20 through the plug port 62, and the sleeve simmerport 53 into the interior of the sleeve and thence through the nozzleIS, the orifice cap 2| into the mixing tube l2 and thence to the burnerto maintain a flame which will give enough heat to boil material placedthereon gently or to simmer. If the valve is turned in a clockwisedirection (as shown in Fig. 2 or 3) or in a counterclockwise direction(as shown in Fig. 5) until the stop sleeve 29 contacts with the stop 3|and the indication oil registers with the arrow 26, the imperforateportions 54 and 63 will cover the inlet port opening from the inletpassage 20 so that no gas may flow from the gas manifold |6 to themixing tube I2. If on the contrary the valve is turned in acounterclockwise direction as shown in Figs. 2 and 3 (clockwise as shownin Fig. 5) thesleeve ports 52, or 5|, 49, 48, 41, and 46 may be causedsuccessively to register with the inlet port connected with the inletpassage 20 so that successively larger amounts of gas may flow tomaintain successively larger flames. Thus the user may secure a flame ofany intensity desired by the user. If the valve is turned still fartherin a counterclockwise direction as is shown in Figs. 2 and 3 (clockwisedirection as shown in Fig. 5)

substantially a full flow of gas will be allowed through the inletpassage 20, the ports 46 and 55, the interior of the sleeve 36, thenozzle IS, the orifice cap 2|, and the mixing tube l2 to the burner.

The valve may be adjusted for gases of various heating values. For thepurpose of adjusting the valve to the desired settings the valve isfirst turned to the full on position and the orifice cap 2| and the airshutter H are adjusted to give the proper flow of gas and the proper airadjustment respectively. Then the valve is turned back to the simmerposition and the screw 39 is adjusted to move the sleeve inward oroutward until the flame is the minimum that will be maintained withoutdanger of going out.

It should be here noted that access to the screw 33 is only possiblewhen the plug of the valve is set in the simmer position. Thus thepositioning of the valve for the simmer position is in a senseautomatic. That is to say it is impossible to try to adjust the flame toa simmer setting except when the plug is positioned at the simmerposition.

The intermediate positions are automatically adjusted for the heatingvalue of the gas by the single adjustment.

It will be understood that more or less of the area of the oblong sleeveports 41, 48, etc., is uncovered depending on the heating value of thegas being used. When adjusted for use with the liquefied petroleum asesonly about 10% of their area is utilized. The natural gases require asetting where the oblong ports are much further uncovered. The mixedgases require still larger openings. The manufactured gases (especiallyif the prevailing gas pressure is low) may require a setting wherein theoblong sleeve ports are near the fully uncovered position. It may alsobe noted that the screw 39 and notch 4|) might be positioned at otherplaces on the circumference of the valve provided they are both movedtogether and provided the screw 31 does not interfere and provided thatthe inner end of the screw 39 is positioned so that it may not enter thenotch 46. It is to be understood that one edge of the oblong ports 41-53inclusive overlaps one edge of the associated round ports 56-62inclusive. The amount of the overlap depends on the adjustment of thesleeve 36 by the screw 39. The edges which overlap may be called theadjustment edges. I wish to point out here that lines drawn to contactthe adjustment edges of ports 41-53 and 56-62 should preferably beparallel. Because of the oval shape of the port 69, it is not soimportant that these lines be parallel to circumferences of the plug,but it is important that they be parallel to each other in order thatmovement of the sleeve 36 by the screw shall adjust each of the portsproportionately.

In the embodiment shown in Figs. 8 and 9 the main body 34 is providedwith a nozzle 92 and with a spring cap casing 93. The plug 64 is formedwith a longitudinal axial bore through which the relatively long screw65 extends. This screw 65 is formed with a shoulder at 66 against whichthe base of the sleeve 61 bears. At its rearward end the screw 65 isprovided with a nut 68 which bears against a spring 69 interposedbetween the nut 68 and the base of the sleeve 61. A guide pin 1| securedin the plug 64 extends through a hole formed in the sleeve 61 and causesthe sleeve to rotate coincidentally with the plug 64. A spring 12 isinterposed between the plug 64 and a stop sleeve 13 which cooperates wih a er ind ntat on Thenlus 54 is stormed with an obl n no -t 5 and soundhe s Flo-.8! inclus ve and the sle ve s -o d with var in w dth s t-likeo t 8-3- 8 i ws an with a large slot or notch 82. The plug is ioripeglwi h a mp r o at i n 89 a d th slee wi h a o ndin mp r o at r i n 99-The m in o y i fo med it a h e d oss 9. ada t d to be t ea d to th a itake manifol The op ati n of thi embod m n sim la to that of th embo entpr v u y des i ed- Adiustmen o e simm e n is a eom r lished b tu n n thva ve to th s m e o ition, rem val of the .kno or dial m mber a ad u tmo e ew t .Featu es f m i en io n p ou y sufficie tl emp si ed h e sha eo t n ck 69 of the inlet port ;20 and the shape of the neck 35 of theinlet port 55. As may be seen by comparison of Figs 4 and 5 and bycomparison of Figs. 8 and 9, the necks or ports 80 and 95 are ob on witht e greater len h xte l tudinally of the valve. As stated above the port55 is oval or oblong in shape and ports 56, 57, 58, 59, .BI, and 62 areround in shape. The port 55 corresponds substantially in size with thesize of the neck or port 80. Similarly as stated above the port isoblong in shape and ports KG-8| inclusive are round in shape with theport 35 corresponding Substantially in size with the neck or port 95.These features make it possible to obtain a relatively large number ofports (or valve positions) with a plug and valve body of regular size.

It is not necessary to hold the stem of the plug when adjustment ofscrew ,39 is being made. It is best however, to hold the stem of theplug when making simmer adjustment of screw 65 (Fig. 8). The full onflow of gas is determined by the position of the orifice cap. The properflame characteristic is determined by adjustment of the air shutter.

The embodiments of the valve disclosed here.- in are also shown in myapplication Serial No. 66,710,'filed December 22, 1948, which isintended to include claims generic to the inventions dis? closed herein.Said application Serial No. 66,710 also discloses embodiments of myinventions disclosed in my application Serial No. 776,687, filedSeptember 29, 1946, and my application Serial No. 6,119, filed February5, 1948.

It is to be understood that the above described embodiments of myinvention are for the purpose of illustration only. Various changes maybe made therein without departing from the spirit andscope of theinvention.

I claim:

1. A valve comprising a non-rotatable casing member, a rotatable rotormember formed with a recess, formed with an open end, and having aplurality of openings all of substantially equal size, substantiallyequally spaced around the circumference of the plug; a hollowcylindrical sleeve formed with an open end, positioned in said recess,rotatable with said rotor member. and having ,a plurality ofsubstantially equally and circumierentially spaced slits ofprogressively increased widths which are respectfully spaced in the sameangular position circumferentially as the respective openings in therotor member and register substantiall With said openings in the rotormember; a handle for turning said rotatable rotor member and said sle veb r t a p u al ty o dif e ent posit ohs to c nt o the am unt of a fl wintherethr ush, th ize oi he home nd th hea devel ed and means to m ve saisl eve lon ie u i ly re ative to the casin and to the ratotobl ot memberto ar he re i tration of th orts to rod ce infini e numb r o p o nor onorifioe. sizes b h perati n f each indi dua sli and it cooperating rotoropenin 2- A lve om ri he a c si ha in an inlet po t nd an o tlet po t; arotor member Po t oned in. said casin and formed with a plurality ofcircumferentially spaced side openings eohh o eo i h o e o sa d p rt andormed wit a oess havi a o en n a one end c nne ted wi h th other o sa dp rts; a c ndrical s eeve having an pen end. po i n d i said recess,termed ith oirou ierehti llv paced s de p h ;ihs re is ri sub ta ti l yw t th de n ni ss of the rot memb and r tata l wi h said rot memb r to apl ra i y o rotata l osition in o d r t c nt h am u t o fl i pass n thee ish e nden u n the rotated p sition of the rotor member and the sleeverelative to he sin a sp in b arin u n a d sle ve and moms in one diection with n sa d oto m mbe and a s rew bea i upo said sleeve formoving it in the opposite direction and linearly p ra le th the axis ofr tati ther of and actin in cooperation with said spring to adjustsimultaneously th f ectiv s z s oi the side penn in t e r o m mber tocontrol th m un of fluid which may pass through said valve for aplurality of said rotative positions.

3. A valve comprising a casing, formed with a ar i e o t on on s e h oformed with an ut t at one end thereof a d h in a a d r c s a apered P usosit on d i sai recess, o w th a c lind ical bo e ha n Open en theme ardsaid outl med with a vely lar inlet openi g ar an ed to eis r a im s witsaid in e p t and th a p ra y i sma e nl t openings ch a ran ed to re se at other m s w th said in t rt; a cylindrical hollow sleeve having oneopen end, p s ned n a or hdr o bo e ha n i open end communicating withsaid outlet, having a relatively large port substantially registering atall times with the larger inlet opening, and havinga plura ity o slits aha in a di e ent w d h a d ac eg te ing su s an ially with one of aid sme th s inl open n s; .me -ns onistihs o a sprin bea in on th b se of. ad sleeve and urging the sleeve in one direction and an adju me sc ew b aing n e a of d sleeve in t e opposit dir ct on to m in said le ve ngi uin ly of th valve n sa d op osi e di e tion to va the overl ppin of eoohor said s eev openin s rela i e to s esis in p u opening to adjustsimultaneously the effective ite o each of so o peni s; and meansconsistih of a cap having a cut-out portion regist rms w h he p si on orthe Screw when the plug turned so that the most. narrow slit is reistered with the inlet port, for preventing ad, iuStIhQht of saidadjustment screw except when said most na row ,slit is registered withsaid inlet port,-

in a Wi d E a, non-rotative casing member h l l inlet opening and anoutlet opening; a otot v a oe membe positioned therein and formed withan inlet port registrable with the n e open ng and te me with a cen ralrecess. whi h re ss i oohne ted with h let port; a ho lo oy in rioolsleeve h vin an open end w ch pen end whht fited. with said outletopening, having the opposite end closed to form an inside bottomsurface, being positioned in said recess, and being formed with a portregistering With the plug inlet port; a headed bolt member positioned inan oil-center hole in said plug member and extending within said recesssubstantially longitudinally of the valve through an off-center hole insaid sleeve so as to prevent rotation of said sleeve relative to saidplug while allowing relative movement of the sleeve to the plug parallelwith the rotative axis; a spring positioned between the head of saidbolt and the inside bottom surface of said sleeve and means for movingsaid sleeve parallel with said rotative axis against the action of thespring.

5. A valve comprising a stationary casing having an inlet port and anoutlet port; a rotative plug within said casing having a recess with anopening at one end which is connected to one of said ports and having aplurality of circumferentially spaced side openings positioned in axialalignment and each connected to the other of said ports; a sleeve withinsaid recess formed with a plurality of circumferentially spaced sideopenings positioned in axial alignment and each substantiallyregistering with one of the side openings of the plug; means forpreventing rotation of the sleeve relative to the plug and formaintaining the side openings of the sleeve in substantial registrationwith the side openings of the plug; and means for moving said sleevelongitudinally relative to the plug to vary the effective size of theopenings formed by the respective side openings in the plug and theregistering side openings in the sleeve.

6. A valve comprising a casing, formed with an inlet port on one sideand with an outlet at one end thereof and having a tapered recess; atapered plug in said recess, formed with a cylindrical bore having anopen end facing toward said outlet, formed with a relatively large inletopening arranged to register at times with said casing inlet port, andformed with a plurality of smaller inlet openings spacedcircumierentially of the plug, positioned in axial alignment, and eacharranged to register at other times with said casing inlet port; acylindrical hollow sleeve having an open end, being positioned in saidcylindrical bore, having its open end communicating with said outlet,having a relatively large port substantially registering at all timeswith the large inlet opening and having a plurality of relatively smallopenings spaced circumferentially of the sleeve, positioned in axialalignment, and each registering substantially with one of said smallerinlet openings; means comprising a screw for moving said sleevelongitudinally to vary the longitudinal registration of said relativelysmall openings with the smaller inlet openings to vary simultaneouslythe efiective size of all of said smaller inlet openings; and meansconstraining said sleeve against rotation relative to said plug.

7. A valve having the structure of claim 5 in which the ports in theplug are round and in which the ports of the sleeve are oblong portshaving parallel sides, having at least one end formed as an arc, andeach having a different size from each of the others.

8. A valve having the structure of claim 5 in which the ports in theplug are round and in which the ports in the sleeve are oblong portshaving parallel sides, having at least one end formed as an arc, eachbeing of a difierent size, and having one edge of each overlapping oneedge of the plug ports so that a line drawn through the overlappingedges of the plug ports is parallel to a line drawn through theoverlapping edges of the sleeve port.

9. A valve having the structure of claim 2 in which the casing has atapered recess; the rotor member is a tapered plug in said taperedrecess; the recess in the rotor member is a cylindrical bore having anopen end facing towards said outlet; the rotor member is formed with arelatively large inlet opening registering at times with said casinginlet port, and is formed with a plurality of smaller inlet openingseach registering at other times with said casing inlet port; thecylindrical sleeve is hollow, has its open end communicating with saidoutlet, has a relatively large port substantially registering at alltimes with the large inlet opening of the plug and has a plurality ofsmaller openings each registering substantially with one of said smallerinlet openings of the plug.

10. A valve having the structure of claim 2 in which the casing has atapered recess; the rotor member is a tapered plug positioned in saidtapered recess; the recess in the rotor member is a cylindrical borehaving its open end facing toward said outlet; the rotor member isformed with a relatively large inlet opening arranged to register attimes with said casing inlet port, and is formed with a plurality ofsmaller inlet openings all of substantially the same size as each otherand each arranged to register at other times with said casing inletport; the cylindrical sleeve is hollow, has its open end communicatingwith said outlet, has a relatively large port substantially registeringat all times with the larger inlet opening of the plug, and has aplurality of smaller slit openings positioned at the same angularposition as the smaller inlet openings of the plug and each arranged toregister substantially with one of said smaller plug inlet openings; andthe means for moving the sleeve longitudinally changes the orifice sizeof each slit proportionately with each other slit so that the valve isuniversal for all kinds of gas.

ISAAC VERNON BRUMBAUGH.

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